AUSTIN - For the fourth year in a row, Austin ranks No. 1 on Forbes' list of the country's fastest-growing cities. Austin had a 2.5 percent estimated population growth in 2013 — the highest of all geographic regions in the country, according to Forbes. Austin's economy grew 5.9 percent in 2013.

It's something that Austin demographer Ryan Robinson laid out in his latest findings that estimate how many people are moving to the Austin area every day.

Houston, which has ranked near the top of the list in recent years due to the huge surge in domestic oil and gas production, fell all the way from No. 2 last year to No. 10.

Dallas ranked in the top five at No. 4 and San Antonio ranked No. 20 this year.

Texas’ strong population growth, unemployment rate under 6 percent, business-friendly regulatory environment, lack of state income tax and highly educated labor market helped it put four cities on the list.